HW-Pack

BSP

Manual build

Mainline U-Boot

Mainline kernel

Tips, Tricks, Caveats

AV plug

The 3.5mm RCA AV jack has the following pinout:

Tip: Composite
Ring 1: Audio Left
Ring 2: Audio Right
Base: Ground

FEL mode

The "UBOOT" button triggers FEL mode. It is located between UART and the microSD slot. FEL mode is currently not too useful due to the lack of a standard OTG port, but perhaps a special USB Type-A (male-male) cable could work.

Adding a serial port (voids warranty)

UART pads

Device disassembly

The top lid (shiny part) is held only by plastic notches. Insert your Plastic tool between top and bottom case vertically, and carefully work your way round.

Locating the UART

RX, TX and GND are clearly marked on the board right next to the microSD slot. Just solder on some wires according to our UART howto, or you can solder in some 2.54mm pitch connectors like in the picture.